RHG 1.30-1.81 Gemstone Refractometer Jewelry Emerald Zircon Testing Tool With LED Flashlight Double Refractometer Professional
Gem refractometer is the most important tool for measuring gems. It can measure the refractive index of gems nondestructive, quickly and accurately, and determine other optical characteristics of gems.
This product uses high refractive index lead glass as the test prism;
Measuring range: 1.30-1.81,
Accuracy: ± 0.002,
Power supply device: LED light with AA battery;
Equipped with 3ml refractive oil (refractive index 1.78)
